Question about Makita Tools 18V 1/2" Lxt Lithium - Ion Hammer Driver - Drill Kit - BHP451

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Worn bearings at the chuck - Makita Tools 18V 1/2" Lxt Lithium - Ion Hammer Driver - Drill Kit - BHP451

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  • Anonymous Apr 18, 2008

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No such parts in the chuck that you can replace.it comes in assy.

Posted on May 29, 2008

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Chuck/shaft wobble


check the bearings for the chuck shaft as they may be worn out

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I can't release the bit from the chuck.


If it is jammed then hold the bit in a vice and try to knock the chuck off with a cold chisel or suitable piece of brass. then you can remove the chuck screw and replace the chuck. You should not be able to see the bearings underneath.

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for maintenance:
after use
1: cleanup with air pressure(inside of motor by motor vent)

weakly
2:clean chuck with brake cleaner and lubricate with metabo grease

at 3 month
3 check motor brush

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Btd 140 rfe chuck not spinning true


The usual reason for major wobble of the spindle is a worn gearcase. It can easly be replaced. Any good repair agent can do it. If you want to do it yourself. Simply remove the circlip holding the chuck sleve on then take off the washer, spring and balls. release the light unit from underneath and take off the locking block. The gearbox cover will then unscrew (but can be tight) I think it is lefthand thread.Check spindle for wear and lubricate the bush bearing in the new gearcase, then rebuild in reverse mode

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Chuck not staying in


if the chuck is falling off the taper try cleaning both chuck and taper then use loctite bearing retainer on taper then tap chuck back on and let sit for a couple hours

Feb 23, 2011 | Westward Drills

1 Answer

I have a HILTI TE905 breaker and something is seems wrong with the chuck or the chilsal as it keeps falling out of the end and not gripping it. Is it possible to take the chuck apart to see if I can spot...


I have just dismantled my own TE 905 to see why it was dropping the chisels and have found the following:-

1. The chisel is worn and has almost become too small for the chuck. (mesure the thickness of the chisel at both ends of the hexagonal shaft and see the difference)

2. The chuck is worn and will probably need to be replaced.
I phoned Hilti today and was quoted £100 for ONE PART OF THE CHUCK!!!

a. The chuck as a whole can easily be removed by undoing the four torx screws that hold the chuck on to the main body.

b. The chuck can be dismantled by removing the retaining ring that holds the metal outer case in place at the front of the chuck. This is very fiddly and requires some engineering skill, the use of pointed instruments could easily result in injury.

The third fix is the one I am going to use to 'patch up' my old breaker. This involves welding some small amounts of dissimilar weld onto the points of the hexagonal section at the rear of the chisel then grinding them to near enough the original size of the un-damaged section of the chisel.
This will very crudely stop the chisel from passing the ball bearings inside the chuck. PLEASE NOTE THAT ANY HEAT APPLIED TO THE CHISEL WILL CAUSE STRESS AND POSSIBLE FAILURE OF THE CHISEL. ANY MODIFICATIONS OF THIS NATURE COULD RESULT IN INJURY TO PERSONS WORKING AROUND YOU AND ARE NOT RECOMMENDED IF YOU ARE WORKING AT HEIGHT OR WITH PEOPLE BELOW YOU. This is a fix that should only be attempted by competent engineers for use on a DIY or small job basis. Hope this helps.

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1 Answer

How do we get the chuck to stay on, has 4 ball bearings and slots but won"t stay in place.


You twist the chuck counter clock wise while pushing down on it. It will not go on if you rotate it clockwise. Must be COUNTER CLOCKWISE. If this doesn't work then the bit sleeve in the chuck is worn too much and needs repalced. You remove the chuck by rotating counter clockwise and pulling up on it.

Jul 08, 2010 | Bosch 11236VS Rotary Hammer

1 Answer

How to replace the chuck on a hilti te10


The complete chuck is not easily replaced. It you stick an SDS+ bit in the chuck and it seems to fit tight without much wiggle then the chuck can be replaced without taking the tool apart. The rubber cap on the end will just pull off. Next the locking collar with the annular spring will come off with the out side sleeve. Underneath is the guide tube with two enlongated rollers. The locking collar should have a ball bearing underneath it that locks the sleeve in place. Usually the roller bearings or ball bearing are missing.

Mar 14, 2010 | Hilti Drills

1 Answer

The drill bits do not stay in it looks like the bearing is worn thanks jason


your on the right track, you'll need to order the head chuck body assay complete.

Oct 14, 2009 | Drills

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